Stage and Live Production

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Truss Point Load and Span Capacity - UDL capacity from manufacturer curves; reactions, equivalent-UDL safety factor, pass/fail.
Audio Speaker Time Alignment - Required delay-tower delay (ms) from speed-of-sound formula; Haas-window offset.
DMX-512 Address and Universe Planner - Per-fixture channel ranges, universe utilization, conflict and overflow detection.
Three-Phase Neutral Imbalance and Distro - Neutral current estimate, imbalance percent, harmonic-load warning.
SPL and Inverse Square Law - The sound level at a new distance from a source.
Potential / Needed Acoustic Gain (Feedback Stability) - Whether a sound system can get loud enough (NAG) before it feeds back (PAG).
Line Array Vertical Coverage and Splay - The vertical angle a line array has to cover, the average splay per cabinet that covers it.
Delay Loudspeaker Time and Haas Offset - The delay time to set on a delay tower or under-balcony loudspeaker.
End-Fire and Cardioid Subwoofer Spacing - The per-element delay for an end-fire subwoofer array and the frequency at which its rearward rejection is deepest.
Driver Spacing, Lobing, and Crossover Ceiling - The highest frequency two sources on a given center-to-center spacing can share before the pattern acquires a null.
Two-Transmitter Intermodulation Screen - Where two wireless transmitters put their intermodulation products, and how close a third channel sits to one.
RF Antenna Cable Loss and Amplifier Budget - The loss between a wireless antenna and its receiver, and whether the inline amplifier makes it up or overshoots.
Chain Hoist Lift Time, Power, and Duty Cycle - How long a chain hoist takes to make its trim, how much power it draws doing it.
Gobo Projected Image Size and Keystone - The size a gobo image projects to, how much a non-perpendicular hit stretches it, and what that costs in brightness.
Color-Temperature Correction in Mireds - The mired shift that takes one color temperature to another, the standard correction sheet closest to it.
Haze and Fog Machine Output for a Venue - How much haze output a room needs and how long it takes to get there.
Stage Deck and Platform Live-Load Check - Whether a staging deck and its legs carry the code live load.
LED Wall Data Rate and Processor Ports - The pixel count, uncompressed data rate, and processor port count for an LED wall.
Outdoor Stage and Banner Wind Load - The wind force on an outdoor banner or scrim, the moment it tries to tip the structure with.
Rigging Capacity Quick Check - WLL at angle for shackles / slings / span sets / hoists with safety factor and pass/fail.
SPL with Atmospheric Absorption (ANSI S1.26) - Far-field SPL with per-octave-band atmospheric absorption (alpha dB/m) per ANSI S1.26-2014 (R2019).
Power Distro Per-Leg Loading - Current per leg, percent of service rating, headroom.
Speaker Impedance Network - Series and parallel network impedance with an amplifier minimum-load safety check.
Decibel Converter - Power, voltage, and reference-level decibel conversions plus incoherent source summation.
Amplifier Power to SPL - SPL at the listener from sensitivity, power, and distance, with headroom and inverse power.
Stage Lighting Beam and Throw - Beam pool diameter at a throw distance, and the center-beam illuminance that lands there.
Throw Distance for a Target Beam Pool - The throw distance a fixture needs to cast a target beam (pool) diameter.
Winch Drum Fleet Angle - The sideways angle a wire rope makes running from a fixed lead sheave onto a winch drum.
LED Video Wall Build - Total resolution, physical size, cabinet count, weight.
Projector Brightness and Throw - The projector lumens a screen needs from its size, gain, and target foot-lamberts.
Max Screen Size for a Projector - The largest screen a projector lights to a target brightness.
Room Acoustics: RT60 and Axial Modes - Reverberation time (RT60) and the first axial room modes that cause bass buildup.
Eyring Reverberation Time (RT60, High Absorption) - RT60 by the Eyring-Norris equation: RT60 = 0.049 V / (-S ln(1 - a_bar)).
Speed of Sound in Air vs Temperature - The speed of sound in air from temperature.
Partition Mass-Law Transmission Loss - The wall/partition attenuation the room-acoustics family (reverberation, levels, absorption) was missing.
Absorption Needed for a Target RT60 - The total absorption a room needs to hit a target RT60.
Distance for a Target SPL - The distance at which the sound pressure level falls to a target.
Counterweight Fly System Balance - Required arbor counterweight, out-of-weight amount.
LED Tape PSU and Voltage-Drop Run - Total load, recommended PSU size, and end-of-run voltage of a constant-voltage LED strip.
LED Tape Max Run Before the Far End Dims - The longest single end-fed run before the far end dims past your drop tolerance.

Stage and Live Production

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